Hinge joint for folding rules



July 3, 1934. H. M. GASSTROM HINGE JOINT FOR FOLDING RULES Filed Sept. 10, 1931 ATTORNEY Patented July 3, 1934 1,965,230

7 UNETED STATES PATENT OFFICE HENGE JOINT FOR FOLDING RULES Herman M. Gasstrom, Mount Vernon, N. Y.

Application September 10, 1931, Serial No. 562,076

2, Claims. (01. 33-105) This invention relates to a hinge joint for folddisc shaped side wall 29. The outer face of the ing rules. Wall 29 is spaced inwardly from the outer face The object of the invention is the production of of its accompanying wall 23. The said wall 29 a hinge joint for folding rules adapted to connect has formed therein a circular recessed portion the middle sections of said rules. 32, extending inwardly from the outer face of 0 The second object of the invention is the prothe wall 29. An axial opening 33 is formed in the duction of a hinge joint, having members which recessed portion 32. With the other wall 23 of can be easily clinched to the sections of a foldthe male member 20 is formed a cup shaped ing rule without the use of rivets, pins and the spacer extension, having the outer cylindrical like. wall 37 with the opening 38, and the disc shaped 65 The third object of the invention is the producside wall 39. The outer face of the wall 39 is tion of hinge joints having members that can be spaced inwardly from the outer face of its aceasily formed from sheet metal and the like, and companying wall 23. The said wall 39 has formed which can be easily united to each other. therein a circular recessed portion 42, extending The fourth object of the invention is the proinwardly. An axial opening 43 is formed in the 70 duction of a hinge joint in which one of its memrecessed portion 42. The cup shaped extension bers functions as a spacer for the hinge. having the cylindrical wall 37 is positioned with- In the drawing, Fig. 1 represents a top view in the cup shaped extension having the cylinin full lines of an exempliflcation of the improved drical wall 27.

hinge joint, connected to the middle sections of a One of the middle sections of the folding rule 75 folding rule, with the sections of the rule in is indicated at 50, and has formed therewith their extended or open position, and in dotted at its lower inner corner the clearance space lines with one of the sections of the rule in its having the arcuate shaped wall 51. The side folded position; Fig. 2 shows a top edge view of faces of the middle section 50 adjacent to its Fig. 1; Fig. 3 indicates a top View of a fragmentary inner end have formed therewith plane recesses so portion of one of the middle sections of the rule; 52 and arcuate shaped recesses 53, perpendicu- Fig. 4 is a right hand side view of Fig. 3; Fig. 5 lar to the recesses 52 formed in the section 50. represents a top View of a fragmentary portion The accompanying middle section of the foldof the accompanying middle sections of the rule; ing rule is indicated at 60 and has formed therev Fig. 6 shows a left hand side view of Fig. 5; Fig. with at its lower inner corner the clearance 85 "7 shows an enlarged partial section of Fig. 2 space having the arcuate shaped wall 61. The on the line '7, '7; Fig. 8 indicates a section of Fig. side faces of the middle section 60 adjacent to its '7 on the line 8, 8; Fig. 9 is a section of Fig. '7 on inner end have formed therewith plane recesses the line 9, 9; Fig. 10 represents an enlarged 62 and arcuate shaped recesses 63 perpendicular 35. bottom plan view of the members of the hinge to the recesses 62 formed with the section 60. 90 joint; Fig. 11 represents an enlarged side view of The walls 23 of the male member 20 are seatthe female member of the hinge joint; Fig. 12 ed in the recesses 52, and the flanges 24 are shows a left hand side view of Fig. 11; Fig. 13 seated in the recesses 53 while the prongs 25 are indicates an enlarged side View of the male memforced into the sides of the section 50, to clinch ber of the hinge joint and Fig. 14 shows a left the male member 20 of the hinge to the section 5 hand side view of Fig. 13. 50 of the folding rule.

The hinge joint comprises a male member The female member '70 of the hinge comprises designated in its entirety by the numeral 20, the top wall 72 and the pair of similar side walls and a female member designated in its entirety 73. Each of the latter has formed at the lower by the numeral 70. portion thereof an arcuate shaped flange '74,

The male member 20 of the hinge joint comwhich extends inwardly at right angles to its prises the top wall 22 and the pair of parallel wall. A prong '75 extends from each of the similar side Walls 23 spaced from each other. flanges '74. With each of the side walls '73 is Each of the latter walls has formed at the lower formed a disc shaped extension '77. The outer portion thereof an arcuate shaped flange 24, face of each extension 7'1, is spaced outwardly 105 which extends inwardly at right angles to its from its accompanying side wall '73 and has wall. A prong 25 extends from each of the formed therein a disc shaped recessed portion flanges 24. With one of the walls 23 is formed '78 that extends inwardly. In each recessed porthe cup shaped spacer extension having the outer tion 78 is formed an opening 79.

cylindrical wall 2'? with the opening 28, andthe The side walls 73 of the female member are 119 seated in the recesses 62 of the section 60, and the flanges '74 are seated in the recesses 63, while the prongs 75 are forced into the sides of the section 60 to clinch the female member to said section.

The recessed portions 78 are seated in the recessed portions 32 and 42 of the male member of the hinge.

A thimble shaped pintle is shown having the barrel 90 and the end flanges 91. The barrel 90 extends through the openings 33 and 43 of the male member of the hinge joint, and the flanges 91 are seated in the recessed portions 78 of the extensions '77 of the female member of the hinge joint, and thereby the male and female members of the hinge joint are adjustably connected to each other.

Various modifications may be made in the invention and the present exemplification is to be taken as illustrative and not limitative thereof.

Having described my invention what I desire to secure by Letters Patent and claim is:

1. In a hinge joint the combination of a male member, comprising a pair of similar side walls spaced from each other, an arcuate shaped flange at the lower portion of each of said walls, a prong extending from each flange, a top wall connecting said side walls, a cup shaped spacer extension integral with the lower portion of each of said walls, said cup shaped extensions being disposed one within the other, a female member of the hinge joint comprising a top wall, a pair of similar parallel side Walls spaced from each other extending from the latter top wall, an arcuate shaped flange at the lower portion of each of the latter side walls, a prong extending from each of the latter flanges, a disc shaped extension integral with each of the side walls of said female member, said disc shaped extensions straddling and bearing against the outer faces of the cup shaped spacer extensions of the male member, and a pintle uniting the disc shaped extensions of the female member and the cup shaped spacer extensions of the male member, the arcuate flanges of the members adapted to be seated in recesses of the sections of a folding rule, and the prongs adapted to be pressed into said sections.

2. In a hinge joint the combination of a male member, comprising a pair of similar side walls spaced from each other, a cup shaped spacer extension integral with the lower portion of each of said walls, said cup shaped extensions being disposed one within the other, a female member of the hinge joint comprising a pair of similar side walls spaced from each other, a disc shaped extension integral with each of the side walls of said female member, said disc shaped extensions straddling and bearing against the outer faces of the cup shaped spacer extensions of the male member, a pintle uniting the disc shaped extensions of the female member and means to fasten the walls of both said male and female members to a pair of the sections of a folding rule.

HERMAN M. GASSTROM. 

